Rowboat-propeller.



J. GRANQUIST. ROWBOAT PROPELLER. APPLICATION FILED JUNI314,1911.

Patented J an. 20, 1914.

JOSEPH GRANQUIST, 0F SALT LAKE CITY, UTAH.

ROWBOAT-PROPELLER.

Specification of Letters Patent.

'latented J an. 20, 11.91 4!.

Application filed June 14, 1911. Serial No. 633,045.

To all whom it may concern:

Be it known that I, Josnri-i GRANQUIST, a citizen of the United States,and a resident of Salt Lake City, in the county of Salt Lake and Stateof Utah, have invented certain new and useful Improvements inHowboat-Propellers, of which the following is a specification, referencebeing had to the accompanying drawings.

This invention has relation to an llllproved manually operated propelleremployed in connection with small working and pleasure boats; and theobject of my invention is to provide a device of this general characterof a simple and inexpensive nature and of a compact and durableconstruction, which shall be capable of convenient and accurateadjustment in position upon the gunwale of a boat, in a mannerpermitting the operator to propel the boat while facing the direction inwhich the boat is moving, and providing a means whereby the operator mayeasily stop the boat or turn the same to the right or left.

With these and other objects in view the present invention consists inthe combination and arrangement of parts as will be hereinafter morefully described and finally pointed out in the appended claim, it beingfurther understood that changes in the spe cific structure shown anddescribed may be made within the scope of the claim, without departingfrom the spirit of the invention.

In the accompanying drawings forming a part of this specification, andin which like numerals of reference indicate similar parts in theseveral views: Figure 1, shows a top view of a row boat provided with mymanually operated propelling mechanism. Fig. 2, shows a transversesectional view with parts .broken away, and Fig. 3, shows an enlargedbroken detached detail showing the propeller in side elevation.

In carrying out the aim of my invention, I employ a central support,which is secured centrally within the boat by any suitable means. In theaccompanying drawings I have shown a pleasure boat A, provided with apropelling mechanism embodying my invention. The pillow post 1, isprovided with a securing base 2, and at the upper end has a journalbearing 3, of any approved construction. As shown more clearly in Fig.2, this hearing 3, is provided with an oil cup 4. Secured to the gunwaleof the boat are two similar journal bearings 6, 6,

the axes of which are in alincinent with the axes of the bearing 3. Theupper caps of these journal bearings 6, are secured by means of suitablethumb screws 8, so that the caps of these hearings can be readilyremoved or attached. In connection with these hearings, I use twocounterpart crank shafts l0 and 12, each having an inner hearing end 11,for co-action with the bearing 3, while the outer bearing ends 16, heldwithin the bearings (5, give support to the paddle heads 13. As shown,each hearing end 16, has a stop collar 17. The heads 13, are secured totheir shafts by means of a suitable pin 18, as shown in Fig. 2, and.each head is provided with a plurality of crosswise running apertureswithin which are slidably held the paddle bars 14, each paddle barhaving a flattened tang 10, so that a slightly curved paddle 15, may besocurely fixed to each end of each paddle bar. These bars 14, are squarein cross section, as shown in Fig. 2, while the apertures with in theheads are also square, preventing any rotation of the paddle bars andconnected paddles.

As clearly disclosed in Fig. 2, the inner ends of the crank shafts 10and 12, abut one working against the other, the oil cup 4, draining intothe hearing at the point of union between these two crank shafts.

As shown, the paddle mechanisms are heldv very close to the sides of theboat.

In actuating this propelling mechanism, the operator grasps the handlesa, and rotates the shaft in the proper direction. As the paddle bars 14,assume a vertical posi tion, they gravitate downward and this action isaccelerated in view of the fact that the paddles are slightly curved, sothat when they strike the water, they are drawn down. By synchronouslyrotating the shafts l0 and 12, in like direction, the boat is propelledin a straight direction. However, by rotating one of the shafts fasterthan the other, the boat is given a slight turn toward one side, and inreversing one of the shafts, a sharp, abrupt turn may be imparted to theboat. So also by reversing the movement of both shafts, may the boat bepropelled backward, while at the same time it is capable of being easilystopped.

An incident of convenience to this arrangement for propelling boats, isthat no cars are employed that are likely to become detached from theboat. In removing the upper caps of the bearings 6, the crank shafts canbe easily removed from their bearings, when it is desired to house theboat. The device is further simple and inexpensive in construction, andboth durable and efiicient in operation, and a boat equipped with amanually operated propelling mechanism embodying my invention, may bequickly started, stopped, or turned.

Having thus described my said invention, what I claim as new and desireto secure by United States Letters Patent is:

The combination with a boat, of a pillow post carried centrally withinsaid boat, oppositely positioned journal bearings secured to the gunwaleof the boat in alinement with said pillow post, two crank shafts eachhaving one end revolubly held by said pillow post the other end of eachshaft projecting through one of said bearings, a paddle head having aplurality of crosswise running apertures secured to the outer end ofeach crank shaft, a plurality of bars slidably held within each headaperture, and a curved paddle secured to each end of each bar.

In testimony whereof I aflix my signature, in presence of two witnesses.

JOSEPH GRANQUI ST.

Witnesses PETER C. CARLSTON, DAVID VVHYTE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, I). G.

